Transport of cosmogenic 7Be and 22Na in atmosphereAim of the studyThe objective of the project is to create an international collaboration and use the data produced by the CTBT (Comprehensive Nuclear -Test-Ban Treaty) network to track down the transport of cosmogenic nuclei, a special interest lying in the currents going into and coming from the arctic regions. The data will be shared among different countries and institutions that are interested in improving their transport models. This will be realised by producing time-dependent information on concentrations of cosmogenic 7Be and 22Na in surface air. The cosmogenic 7Be and 22Na can be used as tracers for atmospheric dynamics. ImplementationThe aerosol samples and data in this study are collected from national aerosol sampling sites. The data is analysed and used for comparison of model calculations. At STUK’s Regional Laboratory in Northern Finland the high volume aerosol sampler “Snow White” is used to collect the samples. The filter in “Snow White” is changed every weekday. The data will be inserted into the LINSSI database of STUK. Dissemination and exploitation of the resultsThe results will be published in scientific journals. CollaboratorsSodankylä Geophysical Observatory, Arctic Centre, Finland; Goddard Institute for Space Studies, USA and Radiation Protection Bureau, Health Canada, Canada Timetable2008–2012 Responsible scientistAri-Pekka Leppänen Page updated 15/05/2009
|
/ Research |